freedreno/rnn: rework RNN_DEF_PATH construction

No need for rnn_path.h, just construct the whole thing in meson and pass
via c_args.  Also move where the path is constructed up one level.  This
will be needed for syncing back to envytools, where the path will be
different.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6154>

src/freedreno/meson.build

@@ -21,6 +21,10 @@
 inc_freedreno = include_directories(['.', './registers', './common'])
 inc_freedreno_rnn = include_directories('rnn')
 
+rnn_src_path = meson.source_root() + '/src/freedreno/registers'
+rnn_install_path = get_option('datadir') + '/freedreno/registers'
+rnn_path = rnn_src_path + ':' + get_option('prefix') + '/' + rnn_install_path
+
 subdir('common')
 subdir('registers')
 subdir('drm')

src/freedreno/rnn/meson.build

@@ -27,7 +27,6 @@ libfreedreno_rnn_files = files(
   'rnn.h',
   'rnndec.c',
   'rnndec.h',
-  'rnn_path.h',
   'util.h',
 )
 
@@ -40,9 +39,7 @@ libfreedreno_rnn = static_library(
   ],
   c_args : [
     no_override_init_args,
-    '-DSOURCE_DIR="' + meson.source_root() + '"',
-# TODO how do we get install prefix??
-    '-DINSTALL_DIR=""',
+    '-DRNN_DEF_PATH="' + rnn_path + '"',
   ],
   gnu_symbol_visibility: 'hidden',
   dependencies: [ dep_libxml2 ],

src/freedreno/rnn/rnn.c

@@ -39,7 +39,6 @@
 #include <ctype.h>
 #include <stdio.h>
 #include "rnn.h"
-#include "rnn_path.h"
 #include "util.h"
 
 #include "util/u_debug.h"

src/freedreno/rnn/rnn_path.h

@@ -1 +0,0 @@
-#define RNN_DEF_PATH SOURCE_DIR "/src/freedreno/registers:" INSTALL_DIR "share/mesa/freedreno/registers"